Love this app! But...
This is by far one of my favorite apps for listening to music. I used to use the app play tube to listen to music offline but when that app got a bug I tried so hard to find another like it. The only thing I DO NOT like about Smart Tube is that there is no shuffle button. I really wish there was a button that could randomize the playlist so I dont listen to songs in the same order all the time.
This app can "cache" videos which allows you to listen offline. All the videos on YouTube are on this app. Also you can organize them into separate playlists.
So far the only thing I dont like about this app is the absence of a shuffle option. Greatly recommend this app!
Ash Hope about
MusicTube - Simple Music & Video Player, v3.3